Ventilation grill



FIG. 1 is a perspective view of a ventilation grill showing our newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is a front view, the rear view being exactly the same inappearance, thereof.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

CLAIM The ornamental design for a ventilation grill, as shown anddescribed.